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參數(shù)資料
| 型號(hào)： | PT4485A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | SIP-26 |
| 文件頁(yè)數(shù)： | 4/9頁(yè) |
| 文件大小： | 213K |
| 代理商： | PT4485A |
For technical support and further information, visit http://power.ti.com
Application Notes
PT4485
Configuring PT4485 DC/DC Converters
for N+1 Operation
‘N+1’ vs OR’ing
The PT4485 DC/DC converter modules may be operated
with other PT4485 modules in ‘N+1’ configurations. A
simple OR’ing connection allows a number of converters
to share the load current. An ‘N+1’ configuration adds
redundancy by employing at least one more converter
than is necessary to supply the load. This ensures that
upon the loss of one converter, sufficient capacity remains
to supply the load without interruption. As an example, a
15-A load configured for ‘N+1’ would require no less than
three PT4485 converters. Two are needed to meet the
load demand, plus one additional converter to ensure
redundancy. Figure 1-1 shows the schematic for operat-
ing two PT4485 converters in an ‘N+1’ configuration
for a 7.5-A load application.
Blocking Diodes
A true ‘N+1’ redundant system must also protect the
output bus against fault current back-feeding a converter.
Without a blocking diode, the PT4485 converters can
potentially sink current as a result of a fault at the output.
The blocking diodes 4, (D1 & D2 in Figure 1-1), protect
against reverse current flow under such conditions.
PT4485
1
2
8–13
20
7
REMOTE SENSE (+)
REMOTE SENSE (–)
PROGRAMMING PINS
3
C
OUT, 33F
(Req'd for N+1)
+
1
8–13
14–19
25
24
23
22
21
14–19
2
626
20
626
7
REMOTE SENSE (+)
21
22
23
24
25
3
PROGRAMMING PINS
D
2, OR'ing Diode
(Required for N+1)
–V
IN
+V
IN
7.5-A
LOAD
Inhibit
–V
OUT
+V
OUT
+V
IN
–V
IN
+V
OUT
–V
OUT
VID4 – VID0
+Sns
–Sns
Share
Sync
Inhibit
–Sns
Share
Sync
Inhibit
+Sns
+V
IN
–V
IN
+V
OUT
–V
OUT
VID4 – VID0
C
IN
+
C
IN
+
D
1, OR'ing Diode
(Required for N+1)
F1
F2
C
OUT, 33F
(Req'd for N+1)
+
Figure 1-1; Connection Schematic for Operation in Parallel/N+1 Configuration
Notes
1. For ‘N+1’ redundancy, always use one more converter
than is required to supply the load.
2. The VID pins for all converter modules must be
independently set to the same voltage program code.
3. All converters connected for ‘N+1’ operation must
be located on the same printed circuit board. A
similar footprint and trace layout for each converter
will facilitate current sharing.
4 A number of high-current rectifier diodes are available
with a low forward voltage drop. They are specifically
designed for OR’ing applications
in ‘N+1’ systems. Eg. The 82CNQ030, and MBRB2515.
5. As a result of excess capacity and the losses in the
blocking diodes, system efficiency is reduced.
6. The interconnection of pin 6 (Sync), and pin 26 (Share)
between all modules are required for load current
sharing and operation at a common frequency.
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| PT4485C | 功能描述:CONV DC 12VADJ 48VIN 8.5A HZ SMD RoHS:是 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT4480 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類(lèi)型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?36V 電壓 - 輸入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:3.3A 電源（瓦） - 制造商系列:30W 電壓 - 隔離:1.5kV（1500V） 特點(diǎn):- 安裝類(lèi)型:表面貼裝 封裝/外殼:19-SIP SMD 模塊 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包裝:托盤(pán) 工作溫度:-40°C ~ 85°C 效率:84% 電源（瓦特）- 最大:30W |
| PT4485N | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 100W 48V-Input 12V Output Iso DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT4486 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-W 30-A Programmable Isolated DC/DC Converter |
| PT4486A | 功能描述:CONV DC-DC 12VADJ 48VIN 8.5A HRZ RoHS:是 類(lèi)別:電源 - 板載 >> DC DC Converters 系列:PT4480 標(biāo)準(zhǔn)包裝:10 系列:PT4570 類(lèi)型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?36V 電壓 - 輸入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:3.3A 電源（瓦） - 制造商系列:30W 電壓 - 隔離:1.5kV（1500V） 特點(diǎn):- 安裝類(lèi)型:表面貼裝 封裝/外殼:19-SIP SMD 模塊 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包裝:托盤(pán) 工作溫度:-40°C ~ 85°C 效率:84% 電源（瓦特）- 最大:30W |
| PT4486C | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 100W 48V-Input 12V Out Iso DC/DC Conv RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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